Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C154-1-4S2 found under Valve Globe by Republic Mfg Co. The National Stock Number assigned to this part is 4820010082104, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C154-1-4S2.